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Practice Test- Unit 2 Matter

Total questions: 50

Worksheet time: 28mins

Name
Class
Date
1.
Law of conservation of mass states that 
a)
matter is created
b)
matter is destroyed
c)
matter is neither created nor destroyed
d)
matter does not change
2.

Melting is an example of

a)

chemical change

b)

physical change

3.

A change in which one kind of matter changes into a different kind of matter with different properties is called a _________.

a)

chemical change

b)

physical change

4.

A ________ change produces light and/or heat.

a)

chemical

b)

physical

5.
The difference between elements and compounds is that...
a)
elements can be separated by physical means and compounds cannot.
b)
elements cannot be separated by physical means and compounds can.
c)
elements contain only one kind of atom and compounds contain more than one kind of atom.
d)
elements contain more than one kind of atom and compounds contain only one kind of atom.
6.
 A substance that cannot be broken down into any other substance by ordinarychemical means is called —
a)
molecule
b)
mixture
c)
element
d)
compound
7.
NaHCO3 is an example of —
a)
an abbreviation
b)
a compound
c)
a mixture
d)
an element
8.
At higher temperatures
a)
particles in an object have less energy
b)
particles in an object move faster
c)
a gas contracts
9.

Particles (molecules) in a __________ have more energy than the other states of matter.

a)

gas

b)

solid

c)

liquid

10.

Particles of a liquid _________.

a)

are tightly packed together and stay in a fixed position.

b)

decrease in volume with increasing temperature.

c)

are free to move around one another but still touch.

11.

Which layer is the least dense?

a)

dish soap

b)

vegetable oil

c)

honey

12.

Freezing

a)

Solid to gas

b)

Liquid to solid

c)

Gas to solid

d)

Liquid to gas

13.

Boiling

a)

liquid to gas

b)

gas to solid

c)

gas to liquid

d)

solid to liquid

14.

What is condensation?

a)

gas to solid

b)

gas to liquid

c)

liquid to solid

d)

solid to liquid

15.
Example of a physical property
a)
magnetism
b)
reactivity with oxygen
c)
flammability
d)
non-reactive
16.
Ability to rust is this type of property:
a)
Physical property
b)
Chemical property
17.

What is NOT an indicator of a chemical change?

a)

production of an odor

b)

production of loud sounds

c)

release of bubbles

d)

cooling

e)

release of light/heat

18.

Flammability is an example of a ________.

a)

physical property

b)

chemical property

19.

Density is an example of a ________.

a)

physical property

b)

chemical property

20.
The tool used to measure the mass of a substance or object is a ______________.
a)
balance
b)
graduated cylinder
c)
ruler
d)
thermometer
21.

Jack has a rock. The rock has a mass of 10g and a volume of 2cm3. What is the density of the rock?

a)

5 mL

b)

5 g/cm3

c)

12 g/cm3

d)

1/5 g/cm3

22.

Crumpling paper is an example of a ________________.

a)

physical change

b)

chemical change

c)

physical property

d)

chemical property

23.

A substance made up of two or more chemically combined elements is a(n) _____________.

a)

an element

b)

mixture

c)

compound

d)

solution

24.

A substance that cannot be broken down into any other substance by ordinary chemical means is called a(n) ___________.

a)

molecule

b)

mixture

c)

element

d)

compound

25.

Two or more physically combined substances form ____________.

a)

a compoud

b)

an acid

c)

an element

d)

a mixture

26.

Which of the following is an example of the formation of a mixture?

a)

Rust forming on an iron nail.

b)

Sugar crystals dissolving in water.

c)

Sodium and chlorine forming table salt.

d)

Hydrogen and oxygen reacting to produce oxygen.

27.

Water (H2O), is not found on the periodic table because water is a...

a)

atom

b)

liquid

c)

mixture

d)

compound

28.

This image is a model of...

a)

an element

b)

a compound

c)

a homogenous mixture

d)

a heterogeneous mixture

29.

This image is a model of a...

a)

element

b)

compound

c)

mixture of compounds

d)

mixture of elements

30.

This image represents which of the following?

a)

element

b)

compound

c)

mixture

31.

This image represents...

a)

An element

b)

A molecule

c)

A compound

d)

A mixture of elements and compounds

32.

An element and an atom are different but related because...

a)

A molecule is the same as an atom

b)

An element is made up of all the same type of atom

c)

particular elements are made of many different atoms

d)

An element is smaller than an atom

33.

Air is considered to be matter because it has ___________.

a)

volume and length

b)

protons and electrons

c)

mass and takes up space

d)

color and odor

34.

An example of a homogenous mixture is ____________.

a)

oil and vinegar salad dressing

b)

a mixture of salt and pepper

c)

salt water

d)

raisin bran cereal

35.

The formula N2O means __________.

a)

1 atom of N, 2 atoms of O

b)

2 atoms of N, 1 atom of O

c)

3 molecules

d)

2 atoms of N only

36.

In a solution, the part of the solution that does the dissolving is known as the...

a)

solute

b)

solvent

c)

water

d)

homogeneous

37.

Which mixture would this method be used to separate?

a)

mixture of sand and water

b)

sea water to obtain the salt

c)

iron filings and sulfur

d)

mixture of sugar and water

38.
What kind of properties can only be observed when a substance changes into a different substance?
a)
physical properties
b)
chemical properties
c)
liquid properties
d)
real properties
39.

Boiling is a chemical change.

a)

true

b)

false

40.

What is the definition of physical change?

a)

any change that results in the formation of new chemical substances.

b)

any property that is measurable, whose value describes a state of a physical system

c)

changes affecting the form of a chemical substance, but not its chemical composition.

41.

How many elements are in this compound?

CuSO4

a)

1

b)

3

c)

4

d)

5

42.
A substance made by mixing other substances together and being able to then separate is the definition of a
a)
Combination
b)
Solution
c)
Mixture
43.
A pure substance...
a)
is an element or a compound
b)
is an element or a mixture
c)
is a compound or a mixture
d)
is a mixture
44.

What is CO2 an example of?

a)

an element

b)

a mixture

c)

a compound

45.

An example of a chemical change is

a)

burning

b)

density

c)

melting

d)

electrical conductivity

46.

How many atoms are in one unit of CaCO3?

a)

1

b)

3

c)

4

d)

5

47.

Which of the following is a chemical property?

a)

density

b)

reactivity

c)

color

d)

freezing point

48.

Which of the following are alloys? Check all that apply.

a)

steel

b)

copper

c)

brass

d)

bronze

e)

aluminum

49.

Mixing food coloring into water is a ____ change.

a)

chemical

b)

physical

50.

Which are homogeneous mixtures? Check all that apply.

a)

salt water

b)

ice tea

c)

oil and vinegar salad dressing

d)

pure water

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